• How it got here: Scottish chemist and physicist Sir James Dewar invented the vacuum flask Iin 1892 as a way to keep liquid nitrogen from warming up and turning into gas in his lab.

    如何问世的:1982年苏格兰化学家物理学家JamesDewar爵士发明保温瓶用以防止实验室中的液氮升温气化

    youdao

  • A conventional thermos isn't good enough, but a Dewar flask, invented in the 19th century, holds cryogenic fluids like liquid nitrogen at temperatures of -196oc (-321of) for months at a time.

    传统的恒温器不够但是19世纪发明Dewar flask一次保持液态这样的温度- 1960华氏摄氏度的低温液体几个月之久。

    youdao

  • A suitable device was used instead of the original Dewar flask in the phosphorescence attachment of the spectrophotometer.

    磷光附件中使用适当装置以代替原有杜瓦氏瓶

    youdao

  • An analysis of the mechanism of heat transfer in Dewar flask is made and shows that heat radiation in given case is not negligible.

    本文传热机制进行了定量分析指出热辐射传热杜瓦瓶情形下不可忽略的。

    youdao

  • An analysis of the mechanism of heat transfer in Dewar flask is made and shows that heat radiation in given case is not negligible.

    本文传热机制进行了定量分析指出热辐射传热杜瓦瓶情形下不可忽略的。

    youdao

$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定